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Students, we learnt that blood is a fluid connective tissue. And we also saw that a pumping organ is needed to push the blood across the body. And this pumping organ is nothing but the most important organ of the body which is the heart. Now heart is the involuntary pump, which means it functions without our will. Yes my dear students, heart is an organ of our body which works 365 days a year, 24 hours a day, it keeps on beating.

Now let us study about the human heart. The human heart is a muscular organ. That means it is completely made up of muscles. The size of the heart is that of the human fist approximately. Since heart is a very important organ, it requires protection. So studen